Sylvania



I V 2 Sheets-Sheet 2. T. M. EYNON 8v J. W. GAMBLE Mod e1-.

INJECTOR.

Patented Apr. 9, 1895 UNITED STATES PATENT Fries,

THOMAS M. EYNO N AND, JOSEPH W. GAMBLE, OF PHILADELPHIA, PENN-SYLVANIA,ASS1GNORS TO THE EYNON EVANS MANUFACTURING COM- PANY, OFPENNSYLVANIA.

INJECTOR.

- SPECIFICATION forming part of Letters Patent No. 537,279, dated April9, 1895.

' Application filed May 26,1894. SerialNo. 512,504. (Model) Toall whomit may concern.-

Be it known that we, THOMAS M. EYNOYN and JOSEPH WILLARD GAMBLE,citizens of the United States, residing in the city and county ofPhiladelphia, State of Pennsylvania, have invented a new and usefulImprovement in .Injectors, which improvement is fully set forth in thefollowing specification and ac companying drawings. P

Our invention relates to that class of injectors known as the doubletube injector, and our object is to construct a compact and symmetricalinjector, embodying all the essential features of Patent No. 497,269,granted to Thomas M. Eynon, as regards accessibility to all portions ofthe interior, and simplicity of working parts, and to incorporate someadditional features, which will be hereinafter referred to.

Figure 1 represents a longitudinal section of an injector embodyingourinventionj Fig. 2 represents a horizontal sectional view ofthecasing, taken on the line 02, cc, of Fig. 1. Fig. 3 represents atransverse section on line 00, :20, Fig. 1. Fig. 4 represents alongitudinal section of an injector, showing the connections forthrottling, arranged exteriorly of the injector casing.

Similar letters of reference indicate corresponding parts in all thefigures.

Referring to the drawings: A designates the body or casing of theinjector; B, the

steam inlet; 0, the water supply inlet, and D the outlet to the boiler.

Steam entering at B passesinto the chamber E, which is provided with avalve body F, which has a valve seat G, said valve F being hollow andcontaining a second valve, as will be hereinafter explained, and beingadapted to close a passageleading to the forcing steam chamber H,whichsupplies steam to the foreing nozzle K.

Ldesignates the suction steam chamber, which supplies steam to thesuction nozzle M, which is suitably secured to the partition V theadmission of steam tothis chamber being controlled by the valve N,whichwe term the secondary valve. 0 designates passages leading to saidchamberL, as shown in Fig. 3 especially a communication being effectedbetween said chamber and the chamber-E by -1neans of the said passages0, port P and the opening A in the valve F.

, Q designates an opening in the end of the body- F, in which the valvestem R moves freely.

S designates a chamber connecting the discharge end of the suctioncombining tube T, with the supply end of the forcing combining tube U,into which the nozzle K projects a short distance.

The tube U has its screw-threaded portion R which engages a partition Nbetween the chambers S and W. The end S 'of the tube U passes throughthe diaphragm T substantially sealing the chamber W from the chamber E.V designates the suction chamber into which the water is firstconducted. T is suitably secured at W to the partition which separatesthe chamber V from the chamber S.

W designates a chamber having communication with the atmosphere by meansof the passage Z, and the cored passages X, which The tube leaddownwardly and then turn into the overflow nozzle Y, as shown in dottedlines in Fig. l, at the right.

Through the chamber W water can escape freely from the suction combiningtube T and chamber S through the check valve A, passages Z and X to theatmosphere when starting the injector.

The check valve A is located in the partition between the chambers S andN, and has its seat in the screw-threaded ring B, which has the cage 0',cast thereon, the valve A being guided top and bottom by wings.

The plug D is cast integral with the ring B and cage 0, which extendsabove and below said ring, and has the openings U for the passage offluid. Access can be had to said valve A and its seat B, and both can beremoved at the same time for inspection or reairs b sim ly unscrewingthe ring B, the P Y P plug, seat, valve and cage being withdrawntogether, it being noticed that the portions of position by the latch O,which is pressed downwardly by the spring P, so that it can engage inslots in the are or quadrant R. The latch O is raised by pressing thebent lever S, which is pivoted. at T, toward the handle G.

U designates an arm carrying thearc or quadrant R and is connected tothe handle G. by the pin V. The armUis secured to the valve stem R. asat Y, and.is bored out at Z so thatit can slide on the elongatedstullingbox \V, which formsa guide forthe same, thus relieving the valvestem R from any injurious bending strain.

The valve body F which isadapted to be seated at G, is madein the formof a hollow shell or barrel, and is provided with thevop enr ing A forthe admission of steam.. In said shell moves the enlarged head .X ofthevalve stem R, which has suitably secured to it. the valve N, whiclrisadapted to closethe port P in the, valve F, which leads to the chamber0.

The port between the chamber H and the passages O, is closed by means ofthe piston B which is integral withthe valve body, F.

The hollow portion of the valve]? is made long. enough to allowamovementof. the en: larged head X and the valve N, equal to the amountrequired for regulation, so that the initial movement of the handle Gwill move the valve N from its seat, bringing the enlarged head Xagainst the. shoulder inside the valve F, opening the port P, andallowing steam. to enter the passages O, anda further movement of saidhandle will move thevalve F from its seat G... The valve F is connectedby means of the stems Y and Z" with the overflow valve A and thethrottle piston B said stems passing through thestufting boxes C and Dwhich prevent the escape of steam from the overflow while the injector.is inoperation. The valve N is secured to the en.- larged head X. in anysuitable manner, in the present instance by a pin.E

F and G designate. plugs in the casing A, by. removing which,.accesscan. be readily had to the interior.

The check valve H in the discharge open.- ing of the injector isseatedonthe ring K which can be readily removed. The ringL acts as astop,limiting the movement of said valve which is provided with wingssimilar to the valve A. The nozzle K is screwed into the partition Miandextends a short distance into the tube U, which is screwedinto thepartition N The valves A and B are adapted to open and close theapertures in the parti tions O andP as will be hereinafter set forth.

The operation will now be apparent. Assume the parts to be in thepositions shown in Fig. 1. G to the left, moves the valve N from itsseat on the. port P, allowing steam to pass from the chamber E, throughthe passage A and port P intothe passages O, which lead downwardly intothe chamber L. The steam then blows through the suction nozzle M, andthe suction combining tube T lifts check valve A and escapes through thechamber W, passages Z and X into the nozzle Y to the atmosphere.Thesteam blowing through the nozzles, as just described, produces avacuu m in the chamber V, which causes the water to enter therein,passing thence through the suction combining. tube, T, condensing thesteam in itspassagc, liftingthecheck valve A, passingthrough chambers W,Z, and X, and nozzle Y, and finally. making its exit into theatmosphere.A.further movement of the handle G, causes the enlarged head X of thevalve stem, to come in contact with the interior of the valve F,withdrawing the same from. its seat, but steantis prevented fromentering theforcing chamber H by the piston Qfbn the valve F,.until thepiston 15 has moved far enough to close the port in the partition, P tothe atmosphere. 'A still. further movement of the handleG allows steamto freely flow into the forcing chamber II, and to enter the forcingnozzle K, pass through the. combining, tube U, where it comes in contactwith a stream of water, which is.already being delivered through saidcombining tube U, by the suction tube '1, the speed of the water beingaccelerated by the steam from the forcing nozzle K. The water is stillpermitted. to escape through the passages E, F and X, into theatmosphere, but as the valve A 'is gradually closed the communication isshut off. between the chamber E and the atmosphere, and the water whichhas now attained a high velocity, rushes through the tube U, opens thecheck. valve H and is conducted. to the boiler or elsewhere- Theinjector is now delivering its maximum quantity of water,.and if itis-desired toregulate the same, the handle G is moved forwardsutiiciently to cause the valve N to partiallyclose the port P, therebythrottling the steam entering the. suction chamber, L, whereby thequantity of water entering the boiler can. be reduced 'fifty per cent.of the maximum capacity.

It is of course obvious, that the throttling of the overflow passagesmay be effected by means of connections direct from the valve stem R, tothe valves whichcontrol said passages,.which connections may extendoutside the injector casing ifdesired.

In Fig. 4 I have shown, for the most part in full lines, the, preferredarrangement and location of the external connections, the overflowpassages being arranged vertically in A slight movement of the handlethe present instance instead of horizontally, as seen in Fig. 1, theobject and function however being the same as in said figure.

A designates a stud which is attached to some portion of the arm U, andwhich is engaged by the walls of the slot 13 in one end of the bar C theother end of said bar being pivotally attached to an end of the lever Dby means of astud M, which latter is attached to a suitable portion ofthe stem Y, said lever D being fulcrumed at E the other end of the samebeing pivotally attached to a link F and the other end of the latterbeing pivotally attached to the arm G of the bell crank H, the other armK of said bell crank being suitably connected in the present instance byan intervening link,-to a sleeveL in the vertically-exteudin g overflowpassages, by which means the throttling is effected.

B designates the valve piston which is capable of longitudinal movementas is evident.

The operation is the same as has already been described, the firstmovement of the handle G, acting to withdraw the head N, so as to openthe port P to live steam which passes into the chamber L, as before, thestud A moving freely, in the meanwhile, in the slot B. A furthermovement of the handle G causes the said stud to contact with the wall Nof the slot 15, whereupon by reason of the connection between the bar (3and the stem Y, the head F will be moved from the seat G, thus allowinglive steam to flow into the chamber H, the throttling in the meanwhilebeing simultaneously effected by means of the connections D F, H to thesleeve L the 7 functions of the different parts being the same, andoccurring in the same sequence, as has already been described withrespect to Fig. 1.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. In an injector, a casing,a double seated valve body, a suctionchamber and a forcing chamber, a secondary valve controllinga passageleading to the suction steam chamber, and the valve body controlling apassage leading to the forcing steam'chamber, said valves beingconnected axiallyin line with the overflow valve A and the throttlepiston B said valves A and B controlling passages leading from theinterior of the casing to the atmosphere, said parts being combinedsubstantially as described.

2. In adouble tubeinjector, asuction chamber, a forcing chamber, steaminlets therefor, a valve device for said inlets, a chamber W havingpassages leading therefrom to the overflow and main dischargerespectively, valves controlling said passages, mechanism forpositivelyactuating said last mentioned valves, by the first mentionedvalve device, a chamber S adjacent said chamber W, and a check valvebetween said chambers, said parts being combined substantially asdescribed.

3. In an injector, a suction steam chamber,

a valved steam inlet therefor, the nozzles M and T, chambers S and WV, acheck valve between said chambers,-a passage leading from said chamberWto the main discharge of the injector, a second passage leading to theoverflow, a valve device for said passages and means for positivelyactuating the same, the above parts being combined substantially asdescribed.

4. In a double tube injector, a double seated valve structure or body,adapted to contact the steam inlets, to the suction steam chamber andthe forcing steam chamber respectively, said valve body having the portP leading to the suction steam chamber andcontrolled by the valve N, thechambers S and IV, overflow and discharge passages leading from saidchamber, a check valve interposed between said chambers, S and NV, aseat B for said valve, said seat having attached thereto, the cage Oandthe plug D the latter contacting with the injector casing whereby by theremoval of said plug, the seat, valve and cage are simultaneouslywithdrawn, substantially as described. I

5. In an injector, the combining tube U,

suitably secured in a partition between the chambers S and'W, saidchamber W having valved passages communicating with, the atmosphere, thedischarge end of said tube terminatingin a.chamberE,and passing throughthe diaphragm T whereby the chamber E is substantially sealed from thechamber W, a suction inlet and a valve controlled steam inlet for saidcombining tube, said parts being combined substantially as described.

6. In adoubletubeinjector, adouble seated valve structure or bodyadapted to control the steam inlets tothe suction steam cham-. ber, andthe forcing steam chamber, the said valve body having a port Pleading tothe suction steam chamber controlled by the valve N, whereby thecapacity of the injector may be regulated by a movement of the handlewhich actuates the whole valve body, in com- IIO bination with overflowand discharge passages, said parts being combined substantially asdescribed. V

7. In a double tube injector, a forcing steam chamber, a suction steamchamber, a double seated valve body F, comprising a suitable shell orbarrel having the piston Q adapted to be seated at G, and the port Pcontrolled by a valve N, said valve structure controlling the passagebetween said chambers, an overflow leading from the suction chamber S tothe atmosphere, and controlled by .a valve device A connected to thevalve structure F in such a way that thethrottling of said overflowpassage is efiected simultaneously with the admission of steam to theforcing nozzle K, said parts being combined substantially as described.

8. In an injector, the elongatedstufling box W, adapted to serve as aguide for an arm U, connected to the valve stem B, said arm beingsuitably attached to a handle G the latter having a connection at itsend with a fixed point, said parts being combined substantially asdescribed.

9. In an injector, an unthreadcd plug, connected by an apertured cage,to a threaded ring, the latter being adapted to engage a partition insaid injector, and the plug adapted to engage the injector casing and toform a closure for the same, substantially as described.

10. A plug connected by an apertured cage to a threaded ring, adapted toserve as a valve seat, a check valve provided with wings on each sidewhich serve to guide said valve above and below its seat, said plug,cage and ring being integrahsubstantially as described.

11. In a double tube injector, a forcing steam chamber and a suctionsteam chamber. valved steam inlets therefor, a chamber W having a valvedpassage leading to the overflow, a second chamber E having also a valvedpassage leading to the overflow, means for actuating the above valves byone handle, whereby theoverflow from a chamber W will first bethrottled, then the overflow from the chamber E, substantially asdescribed.

12. In a double tube injector, a forcing steam chamber, a double seatedvalve body separating said chambers and adapted to control the admissionof steam to both, the chambers V, S, \V, and E, suction and forcingcombining tubes, a check valve between said chambers, Sand W, overflowpassages leading from the chambers W and E and means for positivelycontrolling and throttling said passages, the above parts being combinedsubstantially as described.

13. In an injector, the casing A, chambers II, 0, M, V, S, W, and Evalved passages leading from the last two chambers to the atmosphere,the valve body F constructed as shown, having the stem R, valve N andport P, and connections to valves A and B nozzles K and M, tubes U andT, and check valve A, said parts being combined substantially asdescribed.

14. In a double tube injector, constructed substantially as shown, andprovided with the adjacent chambers S and W, the check valve A adaptedto seat on the ring B, said ring having a cage and a plug D castintegral therewith, said parts being combined substantially asdescribed.

15. In an injector, a suction chambcr,a suction combining tube, aforcing combining tube, a chamber S connecting the same, a chamber Wthrough which said forcing combining tube passes, the discharge end ofthe latter being outside of said chamber, suitable overflow passages,and a check valve located between said chambers and said overflow,substantially as described.

16. In adouble tube injector, a forcing and suction steam chamber, adouble seated valve structure actuated by the valve stem R forcontrolling the passage between said chambers, suction and forcingcombining tubes, an overflow leading from the suction chamber to theatmosphere, and an overflow passage leading from the main discharge tothe atmosphere, valve mechanism for controlling said overflows and.adapted to be operated in unison with the valve stem R, substantially asdescribed.

17. In a double tube injector, havinga suction combining tube and aforcing combining tube, chambers into which said tubes discharge, aseparate overflow passage for each of said chambers, and means forpositively throttling said overflow, substantially as described.

18. In a double tube injector, a forcing steam chamber and asuctionsteam chamber, a double seated valve structure controlling thepassage between said chambers, a suction combining tube, and a forcingcombining tube, chambers into which said tubes discharge, a separateoverflow passage from each of said chambers, and means for positivelythrottling each of said overflow passages, said means being actuated bythe same device which moves said double seated valve structure,substantially as described.

THOMAS M. EYN ON.

J OSEPII W. GAMBLE.

Witnesses:

JOHN A. WIEDERSHEIM, R. H. GRAESER.

